From: STEPHEN BECKER I V <Becker004@...>
Date: 2004-09-28T09:23:32+09:00
Subject: Re: {newb} Each statements

ven.rb:27:in `encrypt': undefined method `-' for "a":String (NoMethodError)
	from ven.rb:27:in `map'
	from ven.rb:27:in `encrypt'
	from ven.rb:38 
still

############33here is my code complete its some cipher

def decrypt(data)
               ndata=data.clone
               srand(5000)
               a = ndata.size-1 # control loop
               while a>-1
                       temp=ndata[a]
                       temp-=rand(10)
                       temp= 26-((temp.abs)%26) if temp<0
                       temp= temp%26 if temp>-1
                       ndata[a]=temp+97

                       a-=1

               end
               return ndata

end

def encrypt(data)
		ndata=data.dup
		a = ndata.size-1
		srand(5000)
		ndata = ndata.split(//).map{ |c| ((c-97)+rand(10))%26 }.join #suggested code 

               #end      # this code down here works but its to messy
              # while a>-1
                #       ndata[a]=               ((ndata[a]-97)+rand(10))%26
                  #     a-=1
               #end
               return ndata
end
it=String.new("abcdefghijklmnop")

print decrypt(encrypt(it))
###################
and i get the error above with the new added code. Sorry to be such a pain. 
Becker


On Tue, 28 Sep 2004 05:41:53 +0900, Brian Schr�der
<ruby@brian-schroeder.de> wrote:
> ndata = ndata.split(//).map { | c | ((c-97)+rand(10))%26 }.join
> 
> But there was a thread the efficency of the  different ways to loop the
> bytes of a string some time ago.
> 
> What I'm doing is not inplace, and I'm creating two now objects on the
> way, so if efficency is important this is not perfect.
> 
> Regards,
> 
> Brian
> 
> STEPHEN BECKER I V wrote:
> > nope
> 
> 
> >
> > Z:/ruby/vernam.rb:26:in `encrypt': undefined method `map!' for
> > "abcdefghijklmnop":String (NoMethodE
> > rror)
> >         from Z:/ruby/vernam.rb:38
> > Press any key to continue . . .
> >
> >
> > On Tue, 28 Sep 2004 05:22:54 +0900, James Edward Gray II
> > <james@grayproductions.net> wrote:
> >
> >>
> >>On Sep 27, 2004, at 3:13 PM, STEPHEN BECKER I V wrote:
> >>
> >>
> >>>Do each statements change the thing that they are using?
> >>>data is a a string.
> >>>##code
> >>>
> >>>                              ndata=data.clone
> >>>              a = ndata.size-1
> >>>              srand(5000)
> >>>              ndata.each  do |c|
> >>>                  c=((c-97)+rand(10))%26
> >>>              end
> >>>## code
> >>>
> >>>So ndata indexes are not change?  Am i doing this wrong (well i know
> >>>its not working so it cant be right.)? I have it working with a while
> >>>loop but i am trying to teach my self the ruby way.
> >>
> >>How about using:
> >>
> >>ndata.map! do |c|
> >>       ((c-97)+rand(10))%26
> >>end
> 
> 
> --
> Brian Schr�der
> http://ruby.brian-schroeder.de/
> 
>